print('result', 2 + 3 * 4 ^ 2)
print(math.pi)

for i = 5, 1, -1 do
	print("hello", i)
end

for x = 0, math.pi, 0.1 do
	print(x, math.sin(x), math.cos(x))
end

a = 2
print(a > 0 and 'positive' or 'zero or negative')
